The diagnostic criteria for identifying cutting and piercing soft skin include: (1) small numbers of feathered microscars distributed in a discontinuous or rarely continuous manner along the working edge (e.

Basically, when the blade comes down the windscreen into its resting position, Audi's new device moves the rubber edge fractionally up or down so that the working edge of the rubber isn't always the part that rests on the screen and so saves wear on one specific contact area.

Topcon provides a variety of systems that use non-contacting controlling references such as sonic devices, laser beams and OPS signals to enable automatic positioning of the working edge of the equipment.

In earlier periods, (colonial Virginia, for instance), a small sliver of a tool steel would have been obtained and welded (by forging techniques: remember, they did not have arc or other modern welding technologies then) into the working edge of a tool.

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